outlander (n.)youdaoicibaDictYouDict[outlander 词源字典]
1590s, "foreigner," from outland (see outlandish) + -er (1). Probably on model of Dutch uitlander, German ausländer. In South African English it had a specific sense of "not of Boer birth" (1892) and was a loan-translation of S.African Dutch uitlander.[outlander etymology, outlander origin, 英语词源]
outlandish (adj.)youdaoicibaDictYouDict
Old English utlendisc "of a foreign country, not native," from utland "foreign land," literally "outland" (see out + land (n.)) + -ish. Sense of "unfamiliar, strange, odd, bizarre" (such as the customs of foreigners may seem to natives) is attested from 1590s.